CODE NUCLIDE ORIGINAL DATA TAKEN FROM MODIFICATION ADDITIONAL FILE MODIFICATIONS ORIGINAL DATA TAKEN FROM MODIFICATION ADDITIONAL FILE MODIFICATIONS COMMENTS
1095243 095_Am_243 ENDF/B-VII Covariances - BNL, July, 2011: Covariances were adopted from
COMMARA-2.0, which were supplied by BNL. Covariances are
combination of the uncertainties recommended in the assessment of
Ref. [1] and correlation matrices produced by the WPEC Subgroup
26 [2] converted to the AFCI 33-energy group structure.
Following the low-fidelity approach, the uncertainties in the
low energy region are based on experimental uncertainties of
thermal cross sections, uncertainties of the resonance integrals
and uncertainty of the scattering radius. In the fast region the initial estimates [2] were obtained using
EMPIRE/KALMAN system with default parameterization roughly
adjusted to reproduce trends in the experimental data. The KALMAN
code was run with default uncertainties assigned to the key model
parameters to produce covariances. The assessment [2] modified
considerably elastic uncertainties, slightly increased fission
uncertainties above 6 MeV, reduced those of inelastic, doubled
(n,2n) uncertainties, and essentially confirmed capture and
nu-bar uncertainties. [1] V.M. Maslov, P. Oblozinsky, M. Herman [2] D. Rochman, M. Herman, P. Oblozinsky, and S. F. Mughabghab